With base Race 07, thought of getting some or all bundle add-ons (GT Power Expansion, Race On, WTCC 2010 Expansion and STCC 2). I read somewhere that some of these have different interfaces, so does this mean its better to ohave each of them installed into separate folders than the Race 07 base install folder? Or inside the same Race 07 folder? So there would be 4 or 5 separate startup icons too? Looks confusing. Can someone w/ these add ons help show the best way to install these for best organization? Thanks.